Harlequin rasbora
📖 Overview
Inhabits forest streams . Found in primary peat swamps in larger than 100 fish . Feeds on worms, crustaceans and insects . Eggs spawned at the underside of broad leaves and similar structures . Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 60 cm . Previously known as "Rasbora" but revised as separated genus by Kottelat & Witte (1999) .
🔬 Taxonomy
🐟 Physical Description
Dorsal spines (total): 1; Dorsal soft rays (total): 7; Anal spines: 1; Anal soft rays: 6. This species is shares with T. truncata, presence of a large black axine starting from approximately mid-body with dorsal apex near dorsal-fin origin, ventral apex near pelvic-fin origin, and caudal apex near caudal-fin base. It differs from all its congeners in the following set of characters: a steep sloping lateral head to pre-dorsal region (shared with T. espei, vs. a gentle sloping lateral profile from posterior of head to predorsal region for T. truncata, T. hengeli, T. somphongsi); terminal mouth (shared with all except truncata with a sub-superior mouth); caudal apex of axine reaching caudal-fin base (shared with all except truncata with caudal apex not reaching); dorsal and ventral apices of axine originate near to both dorsal-fin and pelvic-fin origins (shared with truncata vs. dorsal apex starting up to 3 scale-width posterior to dorsal-fin origin and ventral apex starting two scale-width after pelvic-fin origin in espei, hengeli, while axine is reduced to thick black stripe in somphongsi); dorsal fin with distinct orange/red pigments shared with truncata, espei (vs. hengeli, somphongsi with almost hyaline dorsal fin) .Cross section: compressed.
🌀 Behaviour
Behavioural data for Harlequin rasbora is currently being reviewed.
🦐 Diet
Diet information for Harlequin rasbora is currently being compiled.
🥚 Reproduction
Reproduction data for Harlequin rasbora is currently being compiled.
🌍 Habitat & Distribution
Freshwater; benthopelagic; pH range: 5.0 - 7.0; dH range: 5 - 12. Tropical; 22°C - 25°C
🌿 Ecology
worms, crustaceans and insects (Ref
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🌐 Names & Taxonomy
| Language | Common Names |
|---|---|
| 🇬🇧English | Harlequin Rasbora · Purple Harlequin Rasbora · harlequin |
| 🌍AFR | Harlekynvis |
| 🌍CES | razbora klínoskvrnná |
| 🇩🇪German | Keilfleckbarbe · Keilfleckbärbling |
| 🇫🇷French | Rasbora arlequin |
| 🇵🇱Polish | Razbora klinowa |
| 🇵🇹Portuguese | Rasbora-arlequim-verdadeira |
| 🇷🇺Russian | Расбора-гетероморфа |
| 🌍THA | ปลาซิวข้างขวานใหญ่ |
Scientific Synonyms
| Scientific Name | Author | Year | Status |
|---|---|---|---|
| Rasbora heteramorpha | Duncker | 1904 | Synonym |
| Rasbora heteromorpa | Duncker | 1904 | Synonym |
| Rasbora heteromorpha | Duncker | 1904 | Synonym |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 17 records indexed .
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